Safety Products
TYPESEnergy capacity Nm/cycleStroke mm

Safety Shock Absorbers

High return forces with gas pressure accumulator

Crane Installations, Optimized Characteristic
Energy capacity 56,800 Nm/cycle
Stroke 250 mm

Reliabity: The emergency stop from the large scale SDP63 to SDP160 product family have internal system seals. Even dirt or damages to the piston rod do not lead to a leakage or failure. Compressed gas accumulators allow return forces of up to 100 kN, which can make applications in multiple bridge crane systems safer, for example. The absorber body and the robust, large-sized piston rod bearing are also designed for heavy duty operations

Just like all ACE safety shock absorbers, the characteristic curve or damping characteristics of each individual absorber is individually adjusted to the respective application.

CAD Drawings


Crane Installations, Optimized Characteristic


Stroke250 mm
A max.865 mm
B579.5 mm
C355 mm

Technical data

Energy capacity 56,800 Nm/cycle

Reacting Force 250,000 N

Return Force min. 2,500 N

Return Force max. 25,000 N

Side Load Angle max.
2.5 °

Impact velocity range 0.5 m/s to 4.6 m/s. Other speeds on request.

Operating temperature range -20 °C to +60 °C. Other temperatures on request.

Mounting in any position

Positive stop Integrated

Material Outer body: painted steel; Rod end button: steel; Piston tube: hard chrome plated steel

Damping medium HLP 46

Filling pressure approx. 5 bar. Rod return by integrated nitogen accumulator.


The shock absorber can be pushed through its stroke. In creep speed conditions the shock absorber provides minimal resistance and there is no braking effect.

On request

Special oils, special flanges, additional corrosion protection etc.

General information

Application Examples

SDP63-160 Brakes in locks
SDP63-160 Brakes in locks
Driving into lock gates should be specifically facilitated when navigating through Dutch river locks. That is why ACE developed special dampers, based on existing safety shock absorbers but with optimized characteristics, a fixed stop and a stroke of 800 mm. These are able to absorb 500,000 Nm, which means they can cope with fully loaded ships and also the mechanical impacts resulting from ...

Application Areas

  • shelf storage systems
  • heavy load applications
Whether its crane systems or machines in heavy duty applications e.g. in the metal industry or in mining, these powerful safety shock absorbers reliably protect construction designs against expensive failure.

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